SX1231 SEMTECH [Semtech Corporation], SX1231 Datasheet

SX1231

Manufacturer Part Number

SX1231

Description

Low Power Integrated UHF Transceiver

Manufacturer

SEMTECH [Semtech Corporation]

Datasheet

1.SX1231.pdf (78 pages)

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Download datasheet (896Kb)

SX1231 Transceiver

Low Power Integrated UHF Transceiver

The SX1231 is a highly integrated RF transceiver capable of

operation over a wide frequency range, including the 433,

868 and 915 MHz license-free ISM (Industry Scientific and

Medical) frequency bands. Its highly integrated architecture

allows for a minimum of external components whilst

maintaining maximum design flexibility. All major RF

communication parameters are programmable and most of

them can be dynamically set. The SX1231 offers the unique

advantage of programmable narrow-band and wide-band

communication modes without the need to modify external

components. The SX1231 is optimized for low power

consumption while offering high RF output power and

channelized operation, suitable for both the European (ETSI

EN 300-220-1) and the North American (FCC part 15)

regulatory standards. TrueRF™ technology enables a

lowcost external component count (elimination of the SAW

filter) whilst still satisfying ETSI and FCC regulations.

Rev 2 - Nov 2009

ADVANCED COMMUNICATIONS & SENSING

GENERAL DESCRIPTION

APPLICATIONS

Automated Meter Reading

Wireless Sensor Networks

Home and Building Automation

Wireless Alarm and Security Systems

Industrial Monitoring and Control

PA_BOOST

VR_PA

RFIO

GND

PA1&2

PA0

Ramp &

Control

LNA

VBAT1&2

Power Distribution System

Differential

Single to

VR_ANA

Inductor

Loop

Filter

Tank

Frac-N PLL

Synthesizer

Division by

2, 4 or 6

32 MHz

Mixers

XTAL

VR_DIG

Page 1

Modulators

Σ/Δ

KEY PRODUCT FEATURES

ORDERING INFORMATION

RSSI

GND

SX1231IMLTRT

High Sensitivity: down to -120 dBm at 1.2 kbps

High Selectivity: 16-tap FIR Channel Filter

Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm,

80 dB Blocking Immunity, no Image Frequency response

Low current: Rx = 16 mA, 100nA register retention

Programmable Pout: -18 to +17 dBm in 1dB steps

Constant RF performance over voltage range of chip

FSK Bit rates up to 300 kb/s

Fully integrated synthesizer with a resolution of 61 Hz

FSK, GFSK, MSK, GMSK and OOK modulations

Built-in Bit Synchronizer performing Clock Recovery

Incoming Sync Word Recognition

115 dB+ Dynamic Range RSSI

Automatic RF Sense with ultra-fast AFC

Packet engine with CRC, AES-128 encryption and 66-

byte FIFO

Built-in temperature sensor and Low Battery indicator

QFN 24 Package - Operating Range [-40;+85°C]

Pb-free, Halogen free, RoHS/WEEE compliant product

Part Number

Oscillator

AFC

RESET

SPI

RXTX

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

Tape & Reel

Delivery

DATASHEET

www.semtech.com

MOQ / Multiple

SX1231

3000 pieces

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